题目内容
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题目材料：
Last year, Fillmore County`s farmers used Sordane, a highly effective nonpersistent pesticide, on their crops. Though crop yields were satisfactory, aerial spraying of Sordane increased the county`s incidence of respiratory illness. This year, farmers sprayed with the weaker pesticide Kaskanine instead. Crop yields were unchanged, while the county experienced a significant decline in respiratory illness. Therefore, if farmers use only Kaskanine next year, the reduced incidence of respiratory illness will be maintained without sacrificing crop yields.
Which of the following would it be most useful to establish in order to evaluate the argument?
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AWhether Sordane is the most effective pesticide available to farmers in Fillmore County
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BWhether, as a result of last year`s spraying of Sordane, this year`s population of harmful insects was smaller than it would have been in a year following one in which farmers used only Kaskanine
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CWhether the increase in the incidence of respiratory illness in Fillmore County caused by aerial spraying of Sordane was the only consideration in the farmers` decision to switch to Kaskanine
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DWhether the use of Sordane has been discontinued in other counties for the same reasons as in Fillmore County
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EWhether restrictions on the use of Sordane could have produced a significant reduction in the incidence of respiratory illness
B显示答案
